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RESEARCH Dr. Siopsis and his students are working in the rapidly developing subject of black holes and other extended objects in string theory. Despite its shortcomings, string theory is still the only viable quantum theory of gravity. Recent results on black holes, D-branes, etc. [1] are very exciting, having considerably advanced our understanding of quantum aspects of gravity such as Hawking radiation and information loss. Their cosmological implications are currently under intense investigation. Scattering by black holes Particles Multiple black holes Quasi-normal modes Black holes in AdS space Black holes in asymptotically flat space (A)dS/CFT Correspondence and Cosmology (Super)conformal field theory Entropy of conformal field theories dS/CFT correspondence in two and three dimensions dS/CFT correspondence and Cosmology dS/AdS duality The Penrose limit A brane in infinite-volume extra space Fat branes and the graviton propagator The Schwarzschild solution in the DGP model Bibliography

Department of Physics and Astronomy e-mail: siopsis AT tennessee DOT edu

Voice: (865) 974-7859 Fax: (865) 974-7843

401 Nielsen Physics Bldg., The University of Tennessee, Knoxville, TN 37996-1200, U.S.A.